Triangles that have the same measures.

### Symbol

The symbol that indicates a congruent relationship is “≅”, which means “is congruent to”.

### Properties

There are three cases of triangle congruence:

(1) Two triangles are congruent if two angles and the included side are equal for both triangles.

(2) Two triangles are congruent if two sides and the included angle are equal for both triangles.

(3) Two triangles are congruent if their three corresponding sides are congruent.